204441221 has 4 divisors (see below), whose sum is σ = 209195712. Its totient is φ = 199686732.

The previous prime is 204441217. The next prime is 204441229. The reversal of 204441221 is 122144402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204441221 - 2² = 204441217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204441193 and 204441202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204441229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2377181 + ... + 2377266.

It is an arithmetic number, because the mean of its divisors is an integer number (52298928).

Almost surely, 2^204441221 is an apocalyptic number.

It is an amenable number.

204441221 is a deficient number, since it is larger than the sum of its proper divisors (4754491).

204441221 is an equidigital number, since it uses as much as digits as its factorization.

204441221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754490.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 204441221 is about 14298.2943388364. The cubic root of 204441221 is about 589.1006320410.

Adding to 204441221 its reverse (122144402), we get a palindrome (326585623).

The spelling of 204441221 in words is "two hundred four million, four hundred forty-one thousand, two hundred twenty-one".